Apparatus for the reproduction of drawings by artificial light



P. A. M. DUBIEF. APPARATUS FORTHE REPRODUCTION OF DRAWINGS BY ARTIFICIAL LIGHT.

v APPLICATION FILED SEPT. 2, 1919, 1,425,636.

a. W r v wm 1m WA n# 9 r A? r. L D n E P. A. M. DUBIEF. APPARATUS FOR THE REPRODUCTION OF DRAWINGS BY ARTIFICI AL LIGHT.

APPLICATI ON FILED SEPT- 2. I919.

A ttorney.

P. A. M. DUBIEF.

ODUCTION OF DRAWINGS APPLICATION FILED SEPT. 2, I9I9.

APPARATUS FOR THE REPR BY ARTIFICIAL LIGHT.

Patented Aug. 15, 1922.

3 SHEETS-SHEET 3.

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oar-reovsmrres PATENT osrics.

PHILIBERT ,ALZBERT MARI'US DUBIEF, OF GOURBEVOIE, FRANCE.

APPARATUS FOR THE REIRO'DUGTIQN O DRAWINGE BY ARTIFICIAL LIGHT.

To all whom it may concern Be it knowntha't I, Piirninnn'r ALBERT MARIUS DUBIEF, of 28 Rue Armand Syland the running of which is regular, silent and adjustable at will.

According to this invention, thedisplacement or the source or light is obtained by the descent of a counterweight carried by a lower double pulley on which passes a cable which, passing round an upper double pulley loosely mounted 'on a fixed shaft,

controls the displacement of the source or light; one end of this cable is attached to a fixed point and the other to the support of the source of light. A liquid brake is connected to the lower double pulley so as to permit or adjusting the speed of the descent of the counterweight and consequently, the speed or displaceinent o'f the source or lightas well as that 01"- the reproduction, according to the nature and sensitivity ot the papers employed.

7 The apparatus constructed according to this invention may conveniently comprise, in any case, acut out actuated by the counterweight at the end of its downward movement so asto automatically out the current at the end or each reproducing operation. In the accompanying drawingsis shown, by way otexainple only, an apparatus for the displacement of the source of light applicable to apparatus for the reproduction ol drawings by artificial light. 1

In these drawings: t Figure 1 is a longitudinal vertical section of an apparatus constructed in accordance with this invention; Figure Qis an end View;

7 Figure 3 shows diagramatically in perspective the control and driving device for the source of light, Y

Specification of Letters Patent.

Patented A110. 15,1922.

Application filed September 2, 1919. Serial No. 321,127.

Figures 4:. and 5 are detail views, on a enlarged scale, of the lamp-carrier;

Figure 4i is a vertical longitudinal section thereof on line A-A of Fig, 5;

-Figure 5 is a plan View; Figure 6' shows in liquid brake;

Figure '7 is a side elevation of a modification of the device producing the displacement of the lamp and its application to an ordinary vertical frame.

As illustrated in Figures 1 to 5, the improved apparatus comprises a fixed glass cylindera arranged in a horizontal or inclined position and supported in any suitable manner on a frame I) for receiving the drawings to be reproduced.

Within this cylinler can be displaced longitudinally any suitable source of light which, in the example illustrated, is in the form of a metallic filament lamp 6' n1ounted on a special carriage (Z. I i

This carriage, made of insulating material and illustrated in Figures 4: and 5, is carried by two fixed conducting rods 8,

on which it is guided by eyes forined by two contact blades g, it constituted by brushes and secured to this support, as clearly shown in Fig. 4, the said blades corning respectively in Contact with ametallic member 9, fitting against the cap of the lamp, and with the contact 0 or thelarnp.

The carriage (Z may be moved longitudinally in a certain direction within the cylinder a and is connected, for that purpose, to a cable or chain'c' which passes under the pulleys and It: and the tree ends of which are attachedv at i and to the carriage (Z,

The pulley 715 carries driving crank m by incans Oil which the carriage (Z may be brought back to its starting position :tor obtaining a proof. a y

The longitudinal displacement of the lamp-carrying carriage in the reverse direction is automatically obtained by the descent of the coiinte'rweightl. 1,

This counterweight Z iscarrie'd, for that purpose, by a rod a serving asan axis of rotation for a. double pulley 0 suspended to a cable p passing roundthis pulley and another double pulley g loosely mounted on "er tieal section the lixed point r of the frame Z2 and to the carriage (l of the lamp 0.

The speed of descent ol the counterweight Z may be adjusted at will by means of a luiuid brake or reo'ulator :tull shown, in

Fig.

The rod or the piston oi? this regulating device is carried by a fork piece .9" on the axis of the lower double pulley 0 ca *ing the counterweight Z, so that the piston tollows the vertical movements oil? the said counterweight Z.

This piston t is enclosed in a cylinder 24 secured in any suitable manner to the frame or the apparatus and filled with a suitable liquid, such as oil for instance.

The head or the piston t is per-iterated with opening t which may be more or less uin-overed by a sleeve 12, also perforated and surrounding the head of the piston 21', the said sleeve being prolonged, for that purpose, outside tl e fixed cylinder u by a sociret r surroiuiding the rod of the piston and provided with a driving handle o It will be understood that by turning this handle in one direction or the other, the cross sectional area of the openings otlf the piston t is varied and it is thus possible to adjust at will the descent of the piston and the tall ot the counterweight, as to modify the speed of displacement of the lamp 0 according to the nature and sensitivity of the papers used for the reproduction.

The operation of this apparatus is as 'lollows:

A motion of rotation is imparted to the shaft 7' carrying the upper double pulley Q by rotating by hand the crank m of the pulley is.

This action has for its result, on the one hand, (through actuation of the cable 71) to bring the lamp to the right-han d end of the cylinder (4 on which are tll'l'tlllgetl in the ordinary manner the drawings to be repro duced and, on the other hand, to raise, through the traction exerted by the carriage (Z on the cable 2), the actuating counttarweight Z and the piston t of the b 'alre'to their upper or raised position, in. which the lamp 0 is automatically lighted by reason of the closing of the lever switch The cross sectional area of the openings 6 in the piston of the liquid regulator being suitably adjusted by the manipulation. of the handle o it is then simply necessary to remove the hand from the crank m.

Under the action of gravity, the counterweight descends, producing at the same time the unwinding of the cable ,1) passing on the pulleys 0 and. Q and attached, as above mentioned, to the fixed point r and. to the carriage (Z carrying the lamp 0.

By means o if this ar angen'ieiiit, clearly shown in Fig. 3, the traction. exerted on the cable 29 by the descent of the counterweight Z produces the displacement of the lampcarrying carriage (K towards the left oi. the cylinder a.

The lamp therefore moved automatically and longitudinally within the cyliiulcr (1 up to the left-hand end 01 the latter, the movement oi the counterweight being adjusted in such a manner that, when the lamp is at the end of its movement, the counterweight determines the opening of the sw eh m which, as shown in Fig. 3, cuts the feeding of the current to the lamp.

Figure 7 illustrates a modified arrangement enabling one to use the above described driving apparatus with vertical plane f 'ames.

In this application, the driving device still comprises a counterweight Z, carried by a lower double pulley 0, on which passes a cable 0 surrounding a fixed upper double pulley g.

The ends oi? the said cable are attached, on one side, to a lined point r and, on the other side, to the lanup-carrier (E provided with a reflector d and suitably guided on vertical rods i The whole oi? the apparatus, including the oil regulator and the switch, is carried by a vertical "uiulard secured on a support or base 0 suitable shape.

The operation 0.5 this zu paratus is exactly he same as that previously described, except hat the lamp moves vertically opposite the ordinary plane frame .2

lit is to be understood that the driving device of the source of light described above is given only by way of example and it is obvious that the shape, materials, sizes and detail arrangements may be varied without dqaarting from the scope oi. the invention.

Ulaims-- 1, fin apparatus tor the reproduction. .l: lwi by artificial. light, comprising in combination, a :l'iramc; an electric lamp; a movable carriage tor the lamp; fixed con- (hurting guide rods for and. insulated il'roin the carriage; contact Inen'ibersconnecting the lamp to the said. guide rods; a. drivi' coun- 7 terweight; a. plurality ol pulleys; a cable passing over the pulleys and attached to the frame and to the carriage tor moving the lamp in one direction; a hydrai'ilic brake for retarding the descent of the counterweight and controlling lamp; means for lighting and extinguishing the lamp; and means, adjacent to the movable carriage and lamp, for receiving and holding the drawings.

2. An apparatus for the reproduction of drawings by artificial light, comprising in combination a frame; a lined cylinder, mounted on the frame, for receiving and holding the (brewinggs; an eectric lamp within the cylinder; a nunalde carriage tor the speed of the the lamp; fixed conducting guiderods for and insulated from the carriage; contact members connecting the lamp to the said guide rods; a driving counterweight; a plurality of pulleys; a cable, passing over the said pulleys and attached to the frame and to the carriage for displacing the lamp longitudinally in the cylinder in one direction; means for moving the lamp carriage by hand 10 in the other direction, a hydraulic brake for retarding the descent of the counterweight and controlling the speed of the lamp, and means for lighting and extinguishing the said lamp.

The foregoing specification of my improvements in apparatus for the reproduction of drawings by artificial light, signed by me this 23rd day of July, 1919.

PHILIBERT ALBERT MARIUS DUBIEF. 

